SAKKEPrivateKeyParameters (Bouncy Castle Library 1.83 API Specification)

java.lang.Object
- org.bouncycastle.crypto.params.AsymmetricKeyParameter
- - org.bouncycastle.crypto.params.SAKKEPrivateKeyParameters

All Implemented Interfaces:

CipherParameters
```
public class SAKKEPrivateKeyParameters
extends AsymmetricKeyParameter
```
Represents a private key for the Sakai-Kasahara Key Encryption (SAKKE) scheme, as defined in RFC 6508.
SAKKE is an identity-based public key encryption scheme designed for one-pass key establishment. It is used in MIKEY-SAKKE for secure communication key distribution.

This class generates and manages a SAKKE private key, which consists of a randomly generated scalar z. The corresponding public key is computed as Z = [z]P, where P is a publicly known generator point on the elliptic curve.

The private key is used to derive the master secret in the key exchange process.

See Also:

RFC 6508: Sakai-Kasahara Key Encryption (SAKKE)

Constructor Summary

Constructors
Constructor	Description
`SAKKEPrivateKeyParameters(java.math.BigInteger z, SAKKEPublicKeyParameters publicParams)`	Constructs a SAKKE private key with a given private value and associated public parameters.
`SAKKEPrivateKeyParameters(java.security.SecureRandom random)`	Generates a random SAKKE private key and its corresponding public key.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.math.BigInteger`	`getMasterSecret()`	Retrieves the private key scalar (master secret).
`SAKKEPublicKeyParameters`	`getPublicParams()`	Retrieves the public key parameters associated with this private key.

Methods inherited from class org.bouncycastle.crypto.params.AsymmetricKeyParameter
isPrivate

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SAKKEPrivateKeyParameters
```
public SAKKEPrivateKeyParameters(java.math.BigInteger z,
                                 SAKKEPublicKeyParameters publicParams)
```
    Constructs a SAKKE private key with a given private value and associated public parameters.
    
    Parameters:
    
    z - The private key scalar.
    
    publicParams - The associated public key parameters.
  - SAKKEPrivateKeyParameters
```
public SAKKEPrivateKeyParameters(java.security.SecureRandom random)
```
    Generates a random SAKKE private key and its corresponding public key.
    The private key scalar z is chosen randomly in the range [2, q-1], where q is the order of the subgroup. The public key is computed as Z = [z]P, where P is the public generator.
    
    Parameters:
    
    random - A cryptographic random number generator.
- Method Detail
  - getPublicParams
```
public SAKKEPublicKeyParameters getPublicParams()
```
    Retrieves the public key parameters associated with this private key.
    
    Returns:
    
    The corresponding SAKKE public key parameters.
  - getMasterSecret
```
public java.math.BigInteger getMasterSecret()
```
    Retrieves the private key scalar (master secret).
    
    Returns:
    
    The private key scalar z.